Gramophone.



PATENTBD MAR, 24, '1908.

L. T. BAILE. GBAMOPHONE. Arruouxoi nun 1111.21. 1007.

l lIBBTl-IHEET 2.

'UNITED sTATEs PATENT oEEIoE.

LUTE'EET. BAILE, or PHILADELPHIA, PENNsYLvANIA, AssIcNoE', VBr DIRECT AND MEsNE ASSIGNMENTS, or ONE-FIFTH To MAURICE N. WEYL .ANDA WILLIAM A. MACKIE, ONE-FIFTH TO JOSEPH W. SHANNON, ONE-TWEN'IIETH TO FREDERICK J. LGrEIGrER, AND ONE-TWEN-v T-IETH TO LOGAN W. MULFORD, 'OFPHILADELPHI PENNSYLVANIA.

eimuomron'iaA l Specification 'of La'ttersgPatent.

' Patented mmh 24, 190s.

- original appunti@ `:use my e, 199s, srm No, 324,978. .',mviaea ana um Appleman moa rom-nary 21, 19m

y sum Nq..

To4 allwhom it may concern: i

Be 1t known that I, LUTHER T.5HAI LE, a

citizen of the United States, residing in thel city of Philadelphia, State of Pennsylvania,

. 5 have invented'certain'new and usefullm rovements in Gramophones, of which the following is a full, clear, and exact descrip,- tion, 'reference being had to the ,accompanying drawings, forming a part of this specification. Y y

The object of my invention, in devices 'of the class of 'sound-reproducing machines, is

to eect 'a duplicationuof'thesound-vibrations created by a single st lus or needle, by causing it to act onl two iaphragms to lvibrate them simultaneously and in opposite directions to each other; then to receive and vcollect the sound-waves created bythe pulsating diaphragms in independent soundchambers or boxes operating as diaphragm holders, and 'Finally to discharge such soundwaves .from both chambers through. a single horn rhaving a plurality of ybranches leadingl respectively to said independent soundchambers.

To these ends my invention, which is a di'- vision of'my'former and pending application Serial 'Noi 324,978 iiledJuly 6, 1906, for Letters Patent, consists in. the provision of means to mount a pair of diaphragms face to face, in spaced relation, to cause Athem to be simultaneously vibrated, in opposite' directions, by a single stylus or'needle operatively interposed Vbetween them; said cornbined elements being so disposed relatively to each other, that the'vibratory swing ofthe upper end oi the needle-holder caused by the lateral play of the needle in the sou-nd grooves of the tablet, will be in a plane par- 40 alle-l with the plane of the faces of the diaphragms and will always be maintained substantially equidistant between them; independent holders for each diaphragm, constructed and adapted to operate as soundcollecting chambers, means to mechanically connect and operatively support the diaphragm holders in spaced relation to each other and tothe interposed needle, and operatively to the record ortablet actuating the needle; and sound-conneying means consisting of a sound-horn having a plurality of ently receive the sound-waves collected in each4 sound-chamberof the dia hragm holdvers and merge and discharge t ern through the single terminal horn.

In the accompan mg ldrawings illustrating my invention, igure 1 is an alevatiou,

persplctive, of the exterior oi the cabinet i ingr-machine, showing the grooved. record-tablet in place thereon, and the o erative relation of my ldevice thereto', and s owing my multiple ,sound-box construction' Fig'. 2 is a -front view, in vertical section, of the soundwith forked sound-delivery horn.

box dcvice,-and Fig. 3 is a detached detail view of the hollow needle arm, guide-plate therefor, thestvlus and connecting collar between it andthe needle-arm, and means to tension the flexible connection between needie and diapliiragm.` i

In all devices of the clas'sof sGrund-reproP ducingV machines, involving a verticallyreceiving branches operating to independdisposed stylus or needle vcaused to vibrate by contact with the sound grooves of a fiat tablet, and 4to-impart such vibrations to a connected `or combined diaphragnn the said `elementswere so arranged relatively in the -combination that' the needle vibrated in a direction at right angles to the plane of the face of thediaphragm. l change that and `combine the parts in such manner that,

without changing the relation or the needle element to the Hat tablet, when they are brought, as before, into' operative relation, the diaphra ms will be supported over the tablet in a p ane transverse to that formerly occupied and hence the needle vibrations' will be in a plane parallel. to the faces of the. diaphragins, and hence the reciprocatory pull and release onthe flexible connections between the diaphragms 'and the needle will cause them to vibrate in voppositedirections to each other simultaneously.

I will now describe by `reference the drawings, the best form in which l have embodied my invention, and wherein the feature of a pair of diaphragms, set face to face `and caused. to vibrate in opposite .directions y l0() to each other, in combination with the other` elements above referred to, 1s embodied. Each oi' the two diaphragm holders 2, 2, is

. constructed lecting (chamber. rearward of the diaphragm mounted therein.

l These' holders gare sup-v ported edgewise an'd in spaced relation, with their respective diaphra ms 'facing v'each '.other; vand the vwall o eac holder', opposite' lts diaphragm, is apertured'for the purpose ajjoined and spaced the, perforated plate 7 :hereinafter described. The holders 2, 2., are

by a bar 2. at top and by 4at base, said plate ,operating as a guide for thevibratilg needle arm .`;g3ln the space thus formed between the i dia"hragm`s, and their holders,

' junctiveparts are operativelgT va single sty us or needle, its needle-arm and usual ad* supported and arranged. Thec'onnection etween thev top of the needle-arm and the two diaphragme,

' whereby the vibratory movements .of the needle, produced by the tablet Aor record, is transmitted to the diaphragme, `must be flexible and non-rigid, and also elastic to the" extent fof causing.. pulsations,r of Athe diaphra'grns, in response to the vibratory movements of the needle, ,Without altering'the normal direction of such pulsating movements, that is 'to say in order that the diaphra caused to pulsate by vibrations imparte to it, shall have normal ulsating'movements' unrestrained bythe' c aracter of the connection employed to effect the pulsations.

1 For this urpose alsilk threadis well adaptl ed, both o'r its'flexibility or non-rigidity and for its slight but. sufficientelasticity; but

somel other kind -4of vibration-transmitting connection which will effect the functions stated, .may be employed. In using'a silk thread connection, needle-arn1 4, to which is fastened the needle -or stylus 9,' by collar and screw 9a; and a `reel 6 may be employed to wind the end of" the thread and give such slight tension to it as maybe required. "A detail of some im- ,portair'cemay be added if desired, namely,

the cord connection maybe made in two parts, one part which passes through ,and projects above the top o y the -needle arm 4 is provided with a small loop through which lthe other c ord connection freely passes, its

ends bein secured to the oppositely-disposeddiap ragms'.

" I (prefer -to arrange in' the space between the iaphragms 4and their holders, av metallic bar l12, supported by a screw, from the upper connectin plate 2a', The metallic bar 12 is perforate to allow the passage through it of the cord connections between the head of the 'needle-arm and the opposite diaphragms',

and seryes asa guiding support for'such cord connectlons. The diaphragm holders 2,' 2, .have central apertures in the rear wall, as

' before stated, which communicate directly .with the separate tubes 10, 10 leading, as' single tube or horn A102. are smiultaneously vibranches, from a Both dlapliragms -hen'ce the like sound waves -rearward'wa ls of prefer to use a hollenT brated-by the same movements of the sound# 'reproducing stylus or needle, producing llke. i

ulsations of the 'two 1gered diaphragm hold'- 'ing' into independent sound-conveying tubes which however, merge 4into a single tube, created by the pair -of simultaneously acting diaphragms andproc'eedingfrom the pair of independent soundboxes and Atubes and .merged and discharged from the single horn wil be not only much increased in loudness but of the tone will be impro ed.

Having vthus describe my invention, I claimas new Patent A f l. In an' instrument for reproducing combination with Va pair of oppositelyfacing diaphragm holders operating as a-multi le sound-box, each member containin a iaphragm, means to support saidfho ders in spiced relation, with' their respective dia- P agms facing each other, a single needleratory'movements. of the needle, a flexible connection between the needle-arm and each diaphragmsmeansteV operatively support the multiple sound-box msuch relation to the disk-record that the vibrations of the needle-arm will be in a 'plane parallel with the facesA of the horn diverging into two branches communieating inde enditly avith. the' respective the multi le sound-box 2. In an instrument "or reproducingl sound-wavestfrom a disk combination with a pair of oppositely-facing diaphragm-holders operating as a lmulti le sound-box, each member containin 'a iaphragm,m eans to support said, ho ders in s aced relation, with their respective diap ra ms facing each other, a' single hollow need -arm operatively supported between said diaphragme, a flexible connection passing vthrough the interior and connecting it with each diaphragm, and means to adjust .the tension on saidiiexible connection, the 'multiple sound-box 1n such relation to the disk-record that the vibrations of the needle-arm will bein aplane arallel with the faces of the'diaphragms, and a single tubular horn diverging into two branches communicating inde endently with'the res ective rearward wal s of the multiple sound-Ibox.

3..In an` instrumentV for reproducing sound-waves, the combination wit a pair o'f of said needle-arm 'the quality 4 and desire to'securey by Letters 'sound-waves from'a disk sound-record, the

'farm operatively supported between' said diaphragms and mounted to respond to the vidiaphragms, and a single vtubular 5 sound-record, the

its

11s means to operatively support.

oppositelydis osed diaphragm holders operating as soun boxes, each containing a diap agm, means to support said holders in spiced relation'with ltheir respective diap agms facingl each other, ast

us or vrecordv vibrations o the needle to each diaphragm separately but simultaneously, and a single tu ular horn diverging into two tubular branches oommunieatin independently7 with each of the -pair of diap ragm holders.

4C.v In an instrument for reproducing sound-waves, the combination with a pair of diaphragme faoin eaoh other, a pair of "sound boxes in W ichl said diaphragms are mounted, bars connecting said sound-boxes with each other, externally, and operating to support them, in spaced relation; one of said bars being erforated and operating as a guide-plate or the vibrating needle-arm; a

stylus or record needle and a single needlearm mounted to respond to the sound vi brations of the needle and operatively supported in the space between said diaphragme, means between the sin le needle arm and each diaphragm adapte to permit the diaphragms to vibrate in opposite directions to each other and operating to transmitrthe sound vibrations of the needle to each dia phragm separately but simultaneously, each of said soundboxes having an aperture in its wall opposite the diaphragm, with means communicating with said apertures to re ceive and convey the s'oundwaves.

In testimony whereof, I have hereunto affixed my signature this sixteenth day of February A3D. 1907.

LUTHER 'ILHAILE Witnesses:

ADA M. BIDDLE, JAS. C. WoBENsMiin. 

